A semi-submersible wind flow power platform

Abstract

The application discloses a semi-submersible wind and current energy power generation platform, which comprises a semi-submersible platform body, an upper power generation unit and a lower power generation unit, the semi-submersible platform body comprises a central column, the upper power generation unit comprises a vertical axis wind turbine, the vertical axis wind turbine is located at the top end of the central column and above a horizontal plane, and the lower power generation unit comprises an axial flow type ocean current energy generator, the axial flow type ocean current energy generator is located at the bottom end of the central column and below the horizontal plane; wherein the central column, the vertical axis wind turbine and the axial flow type ocean current energy generator have the same axis, the main shafts of the vertical axis wind turbine and the axial flow type ocean current energy generator are independent of each other, in a running state, the rotating directions of the vertical axis wind turbine and the axial flow type ocean current energy generator are opposite, so that the action lines of the gyroscopic moments generated by the vertical axis wind turbine and the axial flow type ocean current energy generator are highly coincident and have opposite directions, the interaction forces of the vertical axis wind turbine and the axial flow type ocean current energy generator are offset, the stability of the platform is improved, and the failure risk is reduced.

Description

Technical Field

[0001] This application relates to the field of offshore wind power generation technology, and more specifically, to a semi-submersible wind turbine power generation platform. Background Technology

[0002] As the development of offshore renewable energy extends from nearshore to open ocean, semi-submersible floating platforms are widely used to carry offshore wind power generation devices due to their good floating stability and ability to adapt to greater water depths and stronger environmental loads.

[0003] When existing floating platforms are equipped with vertical axis wind turbines, the turbines generate significant aerodynamic drag torque and generator electromagnetic torque as they capture wind energy to generate electricity. This reaction torque is transmitted along the tower and deck to the floating body, forming a continuous excitation. This not only directly causes the platform's yaw rotation, but also couples with the platform's roll and pitch movements, leading to platform instability and increased sway. Long-term reaction torque will increase fatigue damage to components, posing a risk of failure.

[0004] In conclusion, improving platform stability and reducing the risk of failure are problems that urgently need to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a semi-submersible wind power generation platform to improve platform stability and reduce the risk of failure.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A semi-submersible wind turbine power generation platform includes: a semi-submersible platform body, the semi-submersible platform body including a central column; an upper power generation unit, the upper power generation unit including a vertical axis wind turbine, the vertical axis wind turbine being located at the top of the central column and above the horizontal plane; and a lower power generation unit, the lower power generation unit including an axial current generator, the axial current generator being located at the bottom of the central column and below the horizontal plane; wherein the axes of the central column, the vertical axis wind turbine, and the axial current generator are aligned, the main shafts of the vertical axis wind turbine and the axial current generator are independent of each other, and in operation, the vertical axis wind turbine and the axial current generator rotate in opposite directions.

[0008] In some embodiments, the vertical axis wind turbine includes a first shaft and first blades arranged circumferentially along the first shaft; the first shaft is rotatably disposed at the top of the central column, and there are at least three first blades, which are distributed sequentially along the circumferential direction of the first shaft.

[0009] In some embodiments, the axial-flow ocean current generator includes a second rotating shaft and second blades arranged circumferentially along the second rotating shaft; the second rotating shaft is rotatably disposed at the bottom end of the central column, and there are at least three second blades, which are distributed sequentially along the circumferential direction of the second rotating shaft.

[0010] In some embodiments, the central column, the first rotating shaft, and the second rotating shaft are aligned; the size of the first blade is larger than the size of the second blade.

[0011] In some embodiments, the vertical axis wind turbine is connected to a first power generation link, and the axial current generator is connected to a second power generation link; the first power generation link and the second power generation link are independent of each other.

[0012] In some embodiments, the semi-submersible platform body further includes: side columns, at least three side columns, which are distributed sequentially along the circumference of the central column; buoys, which connect the central column and the side columns, and the buoys correspond one-to-one with the side columns; and mooring cables, which are disposed on the side columns and are used to connect to the seabed anchoring foundation.

[0013] In some embodiments, the pontoon is a sealed structure in the shape of a long strip or an ellipsoid.

[0014] In some embodiments, the mooring cable is connected to the lower surface or circumferential side surface of the side post, and each side post is connected to at least two mooring cables, which extend radially.

[0015] In some embodiments, the central column, the side columns, and the pontoons are all hollow structures and are filled with ballast material.

[0016] In some embodiments, the top of the central column is provided with a tower connection structure or flange connection structure for mounting the vertical axis wind turbine.

[0017] And / or, the bottom end of the central column is provided with a pod support or a flow guide structure for installing the axial flow ocean current generator;

[0018] And / or, the central column is provided with a through channel for the power output of the vertical axis wind turbine and the axial flow ocean current generator.

[0019] The semi-submersible wind turbine power generation platform provided in this application includes a semi-submersible platform body, an upper power generation unit, and a lower power generation unit. The semi-submersible platform body includes a central column. The upper power generation unit includes a vertical axis wind turbine located at the top of the central column and above the horizontal plane. The lower power generation unit includes an axial current generator located at the bottom of the central column and below the horizontal plane. The axes of the central column, the vertical axis wind turbine, and the axial current generator are aligned, and the main axes of the vertical axis wind turbine and the axial current generator are independent of each other. In operation, the vertical axis wind turbine and the axial current generator rotate in opposite directions, causing the lines of action of the gyroscopic torques generated by the vertical axis wind turbine and the axial current generator to highly coincide and in opposite directions. This cancels out the interaction forces between the two, reducing platform instability caused by the reaction torque of traditional wind turbines, improving platform stability, and reducing the risk of failure. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure of the semi-submersible wind power generation platform provided in the embodiments of this application.

[0022] Explanation of reference numerals in the attached figures:

[0023] 110 - Center post, 120 - Side post, 130 - Buoy, 140 - Mooring cable;

[0024] 200 - Vertical axis wind turbine, 210 - First shaft, 220 - First blade;

[0025] 300 - Axial flow type ocean current generator, 310 - Second shaft, 320 - Second blade. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The terminology used in the following embodiments is for the purpose of describing specific embodiments only and is not intended to be a limitation of this application. As used in the specification and appended claims of this application, the singular expressions "a," "an," "the," "the," "the," and "this" are intended to also include expressions such as "one or more," unless the context clearly indicates otherwise. It should also be understood that in the embodiments of this application, "one or more" refers to one, two, or more; "and / or" describes the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0028] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0029] The "multiple" mentioned in the embodiments of this application refers to two or more. It should be noted that in the description of the embodiments of this application, terms such as "first" and "second" are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0030] like Figure 1 As shown, the semi-submersible wind power generation platform provided in this application embodiment includes a semi-submersible platform body, an upper power generation unit, and a lower power generation unit; wherein, the semi-submersible platform body includes a central column 110, and the upper power generation unit includes a vertical axis wind turbine 200, the vertical axis wind turbine 200 is located at the top of the central column 110, and the vertical axis wind turbine 200 is located above the horizontal plane, so as to capture wind energy above the horizontal plane through the vertical axis wind turbine 200 to realize wind power generation.

[0031] The lower power generation unit includes an axial-flow ocean current generator 300, which is located at the bottom of the central column 110 and below the horizontal plane. The axial-flow ocean current generator 300 captures ocean current energy to achieve wind-ocean current synergistic power generation and realize high utilization of resources.

[0032] Among them, the central column 110, the vertical axis wind turbine 200, and the axial flow ocean current generator 300 are aligned on the same axis, and the main shafts of the vertical axis wind turbine 200 and the axial flow ocean current generator 300 are independent of each other, avoiding the need to share the transmission structure required for the main shaft, which greatly simplifies the overall structure and reduces the operation and maintenance costs.

[0033] During operation, the vertical axis wind turbine 200 and the axial current generator 300 rotate in opposite directions, causing the lines of action of the gyroscopic torque generated by the vertical axis wind turbine 200 and the axial current generator 300 to highly coincide and in opposite directions. This cancels out the interaction forces between the two, reducing platform attitude instability caused by the reaction torque of traditional wind turbines, improving platform stability, and reducing the risk of failure.

[0034] like Figure 1 As shown, the vertical axis wind turbine 200 includes a first rotating shaft 210 and first blades 220 arranged circumferentially along the first rotating shaft 210. The first rotating shaft 210 is rotatably mounted on the top of the central column 110, and there are at least three first blades 220. The at least three first blades 220 are distributed sequentially along the circumference of the first rotating shaft 210 to ensure the capture of wind power.

[0035] For example, there can be three first blades 220, and the included angle between the three first blades 220 is 120°; in other embodiments, there can also be four or five first blades 220, which can be set according to actual needs, and this application embodiment does not limit this.

[0036] In this application, the vertical axis wind turbine 200 can be installed at the top of the central column 110 via a tower connection structure or a flange connection structure to ensure installation stability.

[0037] like Figure 1 As shown, the axial-flow ocean current energy generator 300 includes a second rotating shaft and second blades 320 arranged circumferentially along the second rotating shaft 310. The second rotating shaft 310 is rotatably disposed at the bottom end of the central column 110. There are at least three second blades 320, which are distributed sequentially along the circumference of the second rotating shaft 310 to ensure the capture of ocean current energy.

[0038] For example, there can be three second blades 320, and the included angle between the three second blades 320 is 120°; in other embodiments, there can also be four or five second blades 320, which can be set according to actual needs, and this application embodiment does not limit this.

[0039] In this application, an axial-flow ocean current generator 300 can be installed at the bottom of the central column 110 via a pod bracket or a fairing structure to ensure the stability of the installation.

[0040] like Figure 1 As shown, the axes of the central column 110, the first rotating shaft 210, and the second rotating shaft 310 are aligned so that the lines of action of the gyroscopic torque of the vertical axis wind turbine 200 and the axial current generator 300 coincide and are opposite in direction during operation, thus canceling out their interaction forces.

[0041] like Figure 1 As shown, the size of the first blade 220 of the vertical axis wind turbine 200 is larger than the size of the second blade 320 of the axial flow ocean current generator 300. Since the first blade 220 captures energy in the wind and the second blade 320 captures energy in the seawater during operation, and the air density is much smaller than the seawater density, in order to balance the torque between the size of the first blade 220 of the vertical axis wind turbine 200 and the size of the second blade 320 of the axial flow ocean current generator 300, the size of the first blade 220 is set to be larger than the size of the second blade 320 to achieve dynamic torque balance and further improve the stability of the platform.

[0042] In this application, the vertical axis wind turbine 200 is connected to the first power generation link, and the axial current generator 300 is connected to the second power generation link. The first power generation link and the second power generation link are independent of each other, so that the vertical axis wind turbine 200 and the axial current generator 300 can start and stop independently and switch speeds independently to connect to the grid, thereby improving the response speed to meet the needs of different operating states, and ensuring that the two do not affect each other, so as to ensure power generation efficiency.

[0043] To facilitate the connection of power output between the vertical axis wind turbine 200 and the axial current generator 300, a through channel is provided inside the central column 110. This allows the power output of both the vertical axis wind turbine 200 and the axial current generator 300 to be collected in the electrical compartment of the platform after passing through the through channel, thereby reducing external influences.

[0044] like Figure 1As shown, the semi-submersible platform also includes side columns 120, buoys 130, and mooring cables 140; wherein, there are at least three side columns 120, which are distributed sequentially along the circumference of the central column 110, and the included angle between adjacent side columns 120 is 120°, so as to form a stable triangular symmetrical layout to ensure the stability of the platform.

[0045] For example, there can be three, four or more side columns 120, and the multiple side columns 120 are evenly distributed around the circumference. The selection can be made according to actual needs, and this application embodiment does not limit this.

[0046] The side columns 120 and the center column 110 are connected by floats 130, and the floats 130 correspond one-to-one with the side columns 120. The floats 130 are long strip-shaped or ellipsoidal sealed structures to provide additional heave damping, thereby improving the overall anti-overturning and anti-swaying capabilities of the platform.

[0047] One end of the mooring cable 140 is connected to the lower surface or circumferential side of the side post 120, and the other end is connected to the seabed anchoring foundation. Each side post 120 is connected to at least two mooring cables 140, which extend radially to form multi-point mooring, effectively limiting the horizontal position and bow roll of the platform.

[0048] For example, two, three, or more mooring cables 140 can be connected to each side post 120, and the selection can be made according to actual needs. This application embodiment does not limit this.

[0049] In this application, the mooring cable 140 can be a steel chain, a synthetic fiber cable, or a composite cable, and can be selected according to the water depth and sea conditions. This application does not limit this.

[0050] In this application, the central column 110, the side columns 120, and the pontoons 130 are all hollow sealed structures, and their interiors are filled with ballast material to lower the overall center of gravity of the platform and further improve the stability and anti-overturning capability of the platform.

[0051] The semi-submersible wind turbine power generation platform provided in this application embodiment achieves wind-current synergistic power generation by installing a vertical axis wind turbine 200 at the top of the central column 110 and an axial current generator 300 at the bottom of the central column 110, thereby achieving high resource utilization. The axes of the central column 110, the vertical axis wind turbine 200, and the axial current generator 300 are aligned. During operation, the vertical axis wind turbine 200 and the axial current generator 300 rotate in opposite directions, causing the lines of action of the gyroscopic torques generated by the two generators to highly coincide and in opposite directions. This cancels out their interaction forces, reducing platform instability caused by the reaction torque of traditional wind turbines, improving platform stability, and lowering the risk of failure.

[0052] The above description of the embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A semi-submersible wind power generation platform, characterized in that, include: The semi-submersible platform body includes a central column (110). The upper power generation unit includes a vertical axis wind turbine (200), which is located at the top of the central column (110) and above the horizontal plane. The lower power generation unit includes an axial-flow ocean current generator (300), which is located at the bottom of the central column (110) and is located below the horizontal plane. The central column (110), the vertical axis wind turbine (200), and the axial current generator (300) are aligned. The main shafts of the vertical axis wind turbine (200) and the axial current generator (300) are independent of each other. In operation, the vertical axis wind turbine (200) and the axial current generator (300) rotate in opposite directions.

2. The semi-submersible wind power generation platform according to claim 1, characterized in that, The vertical axis wind turbine (200) includes a first shaft (210) and a first blade (220) arranged circumferentially along the first shaft (210). The first rotating shaft (210) is rotatably disposed at the top of the central column (110), and there are at least three first blades (220), which are distributed sequentially along the circumference of the first rotating shaft (210).

3. The semi-submersible wind power generation platform according to claim 2, characterized in that, The axial-flow ocean current generator (300) includes a second rotating shaft (310) and a second blade (320) arranged circumferentially along the second rotating shaft (310). The second rotating shaft (310) is rotatably disposed at the bottom end of the central column (110), and there are at least three second blades (320), which are distributed sequentially along the circumference of the second rotating shaft (310).

4. The semi-submersible wind power generation platform according to claim 3, characterized in that, The central column (110), the first rotating shaft (210), and the second rotating shaft (310) have the same axis; The size of the first blade (220) is larger than the size of the second blade (320).

5. The semi-submersible wind power generation platform according to claim 3, characterized in that, The vertical axis wind turbine (200) is connected to the first power generation link, and the axial current generator (300) is connected to the second power generation link; The first power generation link and the second power generation link are independent of each other.

6. The semi-submersible wind power generation platform according to claim 1, characterized in that, The semi-submersible platform body also includes: Side pillars (120), there are at least three side pillars (120), and the at least three side pillars (120) are distributed sequentially along the circumference of the central pillar (110); A pontoon (130) is provided, which connects the central column (110) and the side column (120), and the pontoon (130) and the side column (120) correspond one-to-one. A mooring cable (140) is provided on the side post (120) and is used to connect to the seabed anchoring foundation.

7. The semi-submersible wind power generation platform according to claim 6, characterized in that, The pontoon (130) is a sealed structure in the shape of a long strip or an ellipsoid.

8. The semi-submersible wind power generation platform according to claim 6, characterized in that, The mooring cable (140) is connected to the lower surface or circumferential side surface of the side post (120), and each side post (120) is connected to at least two mooring cables (140), with the at least two mooring cables (140) extending radially.

9. The semi-submersible wind power generation platform according to claim 6, characterized in that, The central column (110), the side columns (120), and the pontoon (130) are all hollow structures and are filled with ballast material.

10. The semi-submersible wind power generation platform according to any one of claims 1-9, characterized in that, The top of the central column (110) is provided with a tower connection structure or flange connection structure for installing the vertical axis wind turbine (200); And / or, the bottom end of the central column (110) is provided with a pod support or a shroud structure for installing the axial-flow ocean current generator (300); And / or, the central column (110) is provided with a through channel for the power output of the vertical axis wind turbine (200) and the axial flow ocean current generator (300).

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